﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using System.IO.IsolatedStorage;
using System.Reflection;
using System.IO;
using System.Windows.Resources;
using System.Xml.Linq;
using BiHCurrencyConverter.Model;
using BiHCurrencyConverter.Resources;

namespace BiHCurrencyConverter
{
    public partial class App : Application
    {
        private static ViewModel viewModel = null;

        /// <summary>
        /// A static ViewModel used by the views to bind against.
        /// </summary>
        /// <returns>The MainViewModel object.</returns>
        public static ViewModel ViewModel
        {
            get
            {
                // Delay creation of the view model until necessary
                if (viewModel == null)
                    viewModel = new ViewModel();

                return viewModel;
            }
        }
        
        
        
        /// <summary>
        /// Provides easy access to the root frame of the Phone Application.
        /// </summary>
        /// <returns>The root frame of the Phone Application.</returns>
        public PhoneApplicationFrame RootFrame { get; private set; }

        IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;
        IsolatedStorageFile fileStore = IsolatedStorageFile.GetUserStoreForApplication();

        //Assembly _assembly;

        //StreamReader _textStreamReader;
        //string _textIsolatedStorageReader;

        const double bamCourse = 1.95583;
        const double eurCourse = 1.0;

        /// <summary>
        /// Constructor for the Application object.
        /// </summary>
        public App()
        {
            // Global handler for uncaught exceptions. 
            UnhandledException += Application_UnhandledException;

            // Show graphics profiling information while debugging.
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // Display the current frame rate counters.
                //Application.Current.Host.Settings.EnableFrameRateCounter = true;

                // Show the areas of the app that are being redrawn in each frame.
                //Application.Current.Host.Settings.EnableRedrawRegions = true;

                // Enable non-production analysis visualization mode, 
                // which shows areas of a page that are being GPU accelerated with a colored overlay.
                //Application.Current.Host.Settings.EnableCacheVisualization = true;
            }

            // Standard Silverlight initialization
            InitializeComponent();

            // Phone-specific initialization
            InitializePhoneApplication();
        }

        // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
            //LoadState();

            InitializeCurrencies();


        }



        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void Application_Activated(object sender, ActivatedEventArgs e)
        {
            //LoadState();
        }

        // Code to execute when the application is deactivated (sent to background)
        // This code will not execute when the application is closing
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)
        {
            //SaveState();
        }

        // Code to execute when the application is closing (eg, user hit Back)
        // This code will not execute when the application is deactivated
        private void Application_Closing(object sender, ClosingEventArgs e)
        {
            //SaveState();
        }

        // Code to execute if a navigation fails
        private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // A navigation has failed; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        // Code to execute on Unhandled Exceptions
        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // An unhandled exception has occurred; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        //private void SaveState()
        //{
        //    PhoneApplicationService phoneAppService = PhoneApplicationService.Current;
        //    IsolatedStorageSettings phoneAppSettings = IsolatedStorageSettings.ApplicationSettings;

        //    //phoneAppSettings["ValueToConvert"] = phoneAppService.State["ValueToConvert"];

        //}

        //private void LoadState()
        //{
        //    PhoneApplicationService phoneAppService = PhoneApplicationService.Current;
        //    IsolatedStorageSettings phoneAppSettings = IsolatedStorageSettings.ApplicationSettings;

        //    //string valToConvert = "";

        //    //if (phoneAppSettings.TryGetValue<string>("ValueToConvert", out valToConvert))
        //    //{
        //    //    phoneAppService.State["ValueToConvert"] = valToConvert;
        //    //}



        //}


        // TODO: Rename method to IntializeSettings()
        private void InitializeCurrencies()
        {

            if (!fileStore.FileExists("eurofxref-daily.xml")) // Perform app initialization - first run after install
            {            

                XDocument _doc = XDocument.Load("eurofxref-daily.xml");

                IsolatedStorageFileStream stream = new IsolatedStorageFileStream("eurofxref-daily.xml", FileMode.Create, fileStore);
                try
                {
                    StreamWriter writeFile = new StreamWriter(stream);
                    //writeFile.Write(_textStreamReader);
                    _doc.Save(writeFile);
                    writeFile.Close();
                }
                catch (Exception)
                {
                    MessageBox.Show(AppResources.msgUnableToPerf);
                }

            }

            Utility.InitializeOrUpdateSettings();


        }

        #region Phone application initialization

        // Avoid double-initialization
        private bool phoneApplicationInitialized = false;

        // Do not add any additional code to this method
        private void InitializePhoneApplication()
        {
            if (phoneApplicationInitialized)
                return;

            // Create the frame but don't set it as RootVisual yet; this allows the splash
            // screen to remain active until the application is ready to render.
            RootFrame = new PhoneApplicationFrame();
            RootFrame.Navigated += CompleteInitializePhoneApplication;

            // Handle navigation failures
            RootFrame.NavigationFailed += RootFrame_NavigationFailed;

            // Ensure we don't initialize again
            phoneApplicationInitialized = true;
        }

        // Do not add any additional code to this method
        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            // Set the root visual to allow the application to render
            if (RootVisual != RootFrame)
                RootVisual = RootFrame;

            // Remove this handler since it is no longer needed
            RootFrame.Navigated -= CompleteInitializePhoneApplication;
        }

        #endregion
    }
}